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Q. A singly charged ion of unknown mass moves in a circle of radius 14.0 cm in a magnetic field of 8.2 T. The ion was accelerated through a potential difference of 9.0 kV before it entered the magnetic field.What is the mass of the ion?

Q. The electric potential immediately outside a charged conducting sphere is 190 V, and 10.0 cm farther from the center of the sphere the potential is 140 V.
(a) Determine the radius of the sphere.
(b) determine the charge on the sphere.

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Category:- Physics
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